Seattle Seahawks All-Pro cornerback Richard Sherman isn't one to mince words, especially when it comes to the NFL's policy on performance-enhancing drugs. Sherman, in an interview with the Vancouver Sun on Tuesday, said that "about half the league takes" Adderall.

Last season, Sherman drew a four-game league-imposed suspension when he tested positive for Adderall, an adult stimulant that is prescribed to treat hyperactivity and attention-deficit disorder. Sherman, unlike teammate Brandon Browner, chose to appeal and his suspension was lifted due to errors made with his sample.

Richard Sherman says the league needs to eliminate Adderall as a banned substance. (AP Photo)

Because of what Sherman believes is widespread player use of Adderall, he also thinks the league should remove it from the list of banned substances.

"... The league has to allow it,” Sherman told the Sun. "The league made a mistake in my case. Obviously, I didn't do anything, but you have to go through a process to prove you didn’t do anything. There are still naysayers out there who don't believe me. But I accept it. If everybody loves you, it probably means you’re not much of a player."

Back in 2001, Toronto Raptors forward Charles Oakley made a similar blanket statement about drugs in the NBA, albeit for a non-PED. Oakley said 60 percent of that league's players used marijuana.